Single crystal furnace cover and single crystal furnace with same

Abstract

The utility model provides a single crystal furnace cover and a single crystal furnace with the same. The single crystal furnace cover comprises a furnace cover body, heat insulation plates arranged on the inner side wall of the furnace cover body at intervals and connecting pieces for fixing the heat insulation plates on the inner side wall of the furnace cover body at intervals, and heat insulation hollow layers are formed among the inner side wall of the furnace cover body, the heat insulation plates and the connecting pieces. According to the single crystal furnace cover disclosed by the embodiment of the utility model, the heat insulation plates are connected on the inner side wall of the furnace cover body at intervals, and the hollow layer is formed between the inner side wall of the furnace cover body and the heat insulation plates, so that the heat conducted outwards by the furnace cover body is reduced, and the power loss in the single crystal furnace is effectively reduced. Besides, one side surface, far away from the inner side wall of the furnace cover body, of the heat insulation plate is coated with an absorption layer to absorb light emitted by the liquid level in the furnace, so that the inner side wall of the furnace cover body is prevented from generating light reflection, and the precision of the liquid level temperature measured by a CCD (Charge Coupled Device) in the single crystal furnace is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of single crystal furnaces, and particularly relates to a cover of a single crystal furnace and a single crystal furnace having the same. Background Art

[0002] With the increasing intelligence of single crystal furnaces for photovoltaic use, all aspects such as temperature and system pulling speed rely on the CCD system for judgment. Therefore, the accuracy and stability of the liquid surface brightness measured by the CCD in the single crystal furnace become more and more important. In the existing single crystal furnace solutions, since the inner wall of the furnace cover is a polished surface, the light generated by the liquid surface will be reflected into the CCD lens, resulting in inaccurate system judgment, and the furnace cover is prone to dissipate the heat of the silicon liquid in the furnace through heat conduction, causing power loss of the single crystal furnace. Summary of the Utility Model

[0003] In view of this, the utility model provides a cover of a single crystal furnace and a single crystal furnace having the same, which can improve the accuracy of measuring the temperature of the liquid surface in the furnace and reduce the power loss in the furnace.

[0004] To solve the above technical problems, the utility model adopts the following technical solutions:

[0005] The cover of the single crystal furnace according to the first aspect embodiment of the utility model includes a furnace cover body, a heat insulation plate spaced on the inner side wall of the furnace cover body, and a connecting member that fixedly spaces the heat insulation plate on the inner side wall of the furnace cover body.

[0006] Wherein, a heat insulation hollow layer is formed among the inner side wall of the furnace cover body, the heat insulation plate and the connecting member.

[0007] Further, an absorption layer is provided on one side of the heat insulation plate away from the inner side wall of the furnace cover body.

[0008] Further, the absorption layer is a black coating coated on one side of the heat insulation plate away from the inner side wall of the furnace cover body.

[0009] Further, the shape of the heat insulation plate is consistent with the shape of the inner side wall of the furnace cover body, and the distance between the heat insulation plate and the inner side wall of the furnace cover body is greater than or equal to 10 mm.

[0010] Further, the connecting member is vertically arranged between the inner side wall of the furnace cover body and the heat insulation plate.

[0011] Further, the furnace cover body is formed with a through hole at the top and a cover hole at the bottom, and an opening matching the through hole is formed at the top of the heat insulation plate.

[0012] The connecting member includes a first connecting ring and a second connecting ring. The first connecting ring is disposed around the through hole at the top of the furnace cover body, and the second connecting ring is disposed around the cover opening at the bottom of the furnace cover body.

[0013] Further, a plurality of functional through grooves are formed on the furnace cover body, and functional through holes corresponding to the plurality of functional through grooves are provided on the heat insulation plate.

[0014] The connecting member further includes a plurality of functional through groove connecting rings respectively disposed around the plurality of functional through grooves at the top of the furnace cover body.

[0015] Further, the first connecting ring, the second connecting ring, and the plurality of functional through groove connecting rings are perpendicular to the tangent plane of the surfaces of the heat insulation plate and the furnace cover body. The upper ends of the first connecting ring, the second connecting ring, and the plurality of functional through groove connecting rings are fixedly connected to the inner side wall of the furnace cover body, and the lower ends of the first connecting ring, the second connecting ring, and the plurality of functional through groove connecting rings are fixedly connected to the heat insulation plate.

[0016] Further, a plurality of through holes are formed on the surface of one or more of the first connecting ring, the second connecting ring, and the plurality of functional through groove connecting rings.

[0017] The single crystal furnace according to the second aspect embodiment of the present invention includes the single crystal furnace cover of any one of the above first aspect embodiments.

[0018] At least one of the above technical solutions of the present invention has the following beneficial effects:

[0019] According to the single crystal furnace cover of the embodiment of the present invention, a heat insulation plate is connected at intervals through a connecting member on the inner side wall of the furnace cover body, so that a hollow layer is formed between the inner side wall of the furnace cover body, the heat insulation plate, and the connecting member. The heat conducted outward by the furnace cover body is reduced through the hollow layer, thereby effectively reducing the power loss in the single crystal furnace.

[0020] In addition, the single crystal furnace cover according to the embodiment of the present invention further provides an absorption layer on a side surface of the heat insulation plate away from the inner side wall of the furnace cover body to absorb the light emitted by the liquid surface in the furnace, thereby avoiding light reflection on the inner side wall of the furnace cover body and effectively improving the accuracy of the liquid surface temperature measured by the CCD in the single crystal furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural view of the single crystal furnace cover of the embodiment of the present invention;

[0022] Figure 2 is Figure 1 an enlarged schematic view of the area a in

[0023] Figure 3 is Figure 1 an enlarged schematic view of the b - part area in

[0024] Figure 4 a schematic view of the connection between the heat - insulating plate and the first connecting ring and the second connecting ring in the single - crystal furnace cover of the embodiment of the present utility model.

[0025] Reference numerals: 10. furnace cover body; 11. through - hole; 12. cover opening; 13. cavity; 14. human - eye viewing hole; 15. CCD window; 16. through - hole for water - cooled heat - shield rod;

[0026] 20. heat - insulating plate; 21. opening; 22. long waist - shaped hole; 23. short waist - shaped hole; 24. circular hole; 30. first connecting ring; 40. second connecting ring; 50. connecting flange. Detailed implementation manners

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present utility model fall within the scope of protection of the present utility model.

[0028] Unless otherwise defined, the technical terms or scientific terms used in the present utility model shall have the ordinary meanings understood by those of ordinary skill in the art within the field to which the present utility model belongs. The "first", "second" and similar terms used in the present utility model do not denote any order, quantity or importance, but are only used to distinguish different components. The terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship also changes accordingly.

[0029] First, the single - crystal furnace cover according to the embodiment of the present utility model will be specifically described below with reference to the accompanying drawings.

[0030] The single - crystal furnace cover according to the first - aspect embodiment of the present utility model, as Figure 1 shown, includes a furnace cover body 10, a heat - insulating plate 20 spaced on the inner side wall of the furnace cover body 10, and a connecting member for spacing and fixing the heat - insulating plate 20 on the inner side wall of the furnace cover body 10.

[0031] Among them, a heat - insulating hollow layer is formed between the inner side wall of the furnace cover body 10, the heat - insulating plate 20 and the connecting member.

[0032] That is to say, according to the single crystal furnace cover of the embodiment of the present utility model, heat insulation plates 20 are connected at intervals on the inner side wall of the furnace cover body 10 through connecting pieces, so that a hollow layer is formed between the inner side wall of the furnace cover body 10, the heat insulation plates 20 and the connecting pieces, and the heat conducted outward by the furnace cover body 10 is reduced through the hollow layer, thereby effectively reducing the power loss in the single crystal furnace.

[0033] In some embodiments, an absorption layer is provided on one side of the heat insulation plate 20 away from the inner side wall of the furnace cover body 10.

[0034] That is to say, an absorption layer is provided on one side of the heat insulation plate 20 away from the inner side wall of the furnace cover body 10. As an example, the absorption layer can be a black coating applied on the heat insulation plate 20. The light emitted by the liquid surface in the furnace is absorbed by the absorption layer, thereby avoiding light reflection on the inner side wall of the furnace cover body 10 and effectively improving the accuracy of the liquid surface temperature measured by the CCD in the single crystal furnace.

[0035] Here it should be noted that, in order to facilitate the display of the internal structure of the single crystal furnace cover of the present utility model, Figure 1 what is shown in the figure is the single crystal furnace cover after cutting off part of the sector area.

[0036] In some embodiments, as Figure 1 shown, the vertical section of the furnace cover body 10 along its central axis is arc-shaped, and the shape of the heat insulation plate 20 is consistent with the shape of the inner side wall of the furnace cover body 10, thereby maximizing the internal space of the furnace cover body 10 and ensuring a certain structural stability.

[0037] Preferably, the distance between the heat insulation plate 20 and the inner side wall of the furnace cover body 10 is greater than or equal to 10 mm.

[0038] That is to say, the furnace cover body 10 is designed to be a dome shape with an arc-shaped vertical section along its central axis. When installed on the single crystal furnace, the load can be effectively dispersed to the entire single crystal furnace structure, thereby enhancing the overall stability of the single crystal furnace structure.

[0039] In some embodiments, the connecting piece is vertically arranged between the inner side wall of the furnace cover body 10 and the heat insulation plate 20.

[0040] That is to say, the connecting piece is vertically arranged between the inner side wall of the furnace cover body 10 and the heat insulation plate 20 to ensure the stability of the force between the inner side wall of the furnace cover body 10 and the heat insulation plate 20 and improve the strength of the overall structure.

[0041] In some embodiments, as Figure 1 、 Figure 2 and Figure 3As shown, the lid body 10 of the furnace cover is formed with a through hole 11 at the top and a cover hole 12 at the bottom. Among them, the through hole 11 is used for adding silicon materials into the furnace or for the single crystal silicon rod for pulling to pass through, and the cover hole 12 is used to connect to the single crystal furnace body.

[0042] In some embodiments, a plurality of functional through grooves are further provided on the lid body 10 of the furnace cover.

[0043] Corresponding functional through grooves penetrating the inner and outer side walls of the lid body 10 of the furnace cover are opened thereon. For example, as Figure 1 shown, a human eye viewing hole 14, a CCD window 15, and a water-cooled hot screen rod through hole 16 are respectively opened on the lid body 10 of the furnace cover. Among them, the human eye viewing hole 14 is used for an operator to observe the situation inside the furnace through it, the CCD window 15 is used for installing a CCD camera to capture an image inside the furnace, and the water-cooled hot screen rod through hole 16 is used for extending a water-cooled hot screen rod into the furnace.

[0044] As Figure 4 shown, an opening 21 matching the through hole 11 is formed at the top of the heat insulation plate 20. Corresponding to the plurality of functional through grooves opened on the lid body 10 of the furnace cover, long waist-shaped holes 22, short waist-shaped holes 23, and circular holes 24 and other functional through holes corresponding to the human eye viewing hole 14, the CCD window 15, and the water-cooled hot screen rod through hole 16 are respectively provided on the heat insulation plate 20. The outer side wall of the heat insulation plate 20 is also connected to the edges of the human eye viewing hole 14, the CCD window 15, and the water-cooled hot screen rod through hole 16 on the inner side wall of the lid body 10 through connectors at the edges corresponding to the long waist-shaped holes 22, the short waist-shaped holes 23, and the circular holes 24.

[0045] As Figure 4 shown, the connector includes a first connection ring 30, a second connection ring 40, and a plurality of functional through groove connection rings. The first connection ring 30 is looped around the through hole 11 at the top of the lid body 10 of the furnace cover, the second connection ring 40 is looped around the cover hole 12 at the bottom of the lid body 10 of the furnace cover, and the plurality of functional through groove connection rings are respectively arranged at the edges of the long waist-shaped holes 22, the short waist-shaped holes 23, and the circular holes 24 to connect the heat insulation plate and the lid body 10 together.

[0046] That is to say, near the through hole 11, the cover hole 12, the human eye viewing hole 14, the CCD window 15, and the water-cooled hot screen rod through hole 16 of the lid body 10 of the furnace cover, a first connection ring 30, a second connection ring 40, and a functional through groove connection ring are respectively provided. Thus, the ends of the heat insulation plate 20 corresponding to the through hole 11 and the cover hole 12 are connected to the lid body 10 through the first connection ring 30, the second connection ring 40, and the functional through groove connection ring respectively.

[0047] Preferably, the first connection ring 30, the second connection ring 40, and the plurality of functional through - slot connection rings are arranged perpendicular to the tangent plane of the surface of the heat - insulating plate and the furnace cover body, and the upper ends of the first connection ring 30, the second connection ring 40, and the functional through - slot connection rings are fixedly connected to the heat - insulating plate, and the lower ends of the first connection ring 30, the second connection ring 40, and the functional through - slot connection rings are fixedly connected to the furnace cover body 10, so that the first connection ring 30, the second connection ring 40, and the functional through - slot connection rings are supported between the heat - insulating plate 20 and the furnace cover body 10, and a gap is formed between the heat - insulating plate 20 and the furnace cover body 10.

[0048] That is to say, a hollow layer is formed by enclosing between the first connection ring 30, the second connection ring 40, the plurality of functional through - slot connection rings, the heat - insulating plate 20 and the inner side wall of the furnace cover body 10.

[0049] That is to say, the first connection ring 30, the second connection ring 40, and the plurality of functional through - slot connection rings are arranged between the inner side wall of the furnace cover body 10 and the heat - insulating plate 20, so that a hollow layer is formed by spacing the inner side wall of the furnace cover body 10 and the heat - insulating plate 20 apart. Through the heat insulation of the hollow layer, the loss of the power inside the furnace is further realized. The structure is simple and reliable, and the manufacturing cost is low.

[0050] In some embodiments, as Figure 1 shown, a circular connection flange 50 is formed around the cover opening 12 of the furnace cover body 10. Thus, it is convenient to be detachably connected to the single - crystal furnace body.

[0051] In some embodiments, a plurality of through - holes 41 can be opened on the surface of any one or more of the first connection ring 30, the second connection ring 40, and the plurality of functional through - slot connection rings. The through - holes 41 can maintain the consistency of the pressure inside and outside the hollow layer.

[0052] As an example, as Figure 2 shown, a plurality of through - holes 41 are spaced and opened on the surface of the second connection ring 40. Thus, it is used to maintain the internal pressure of the hollow layer consistent with the outside. The same applies to opening a plurality of through - holes 41 on the first connection ring 30 or the plurality of functional through - slot connection rings.

[0053] In some embodiments, as Figure 1 、 Figure 2 shown, a cavity 13 is formed between the inner side wall and the outer side wall of the furnace cover body 10.

[0054] Thus, by filling the cavity 13 with a cooling liquid, such as water, the temperature of the furnace cover can be effectively reduced.

[0055] In some embodiments, a water inlet nozzle (not shown) is provided on the outer side wall of the furnace cover body 10, and the water inlet nozzle communicates with the cavity 13. Thus, it is convenient to add the cooling liquid into the cavity 13 through the water inlet nozzle.

[0056] The single crystal furnace according to the second aspect embodiment of the present utility model includes the single crystal furnace cover of any one of the above first aspect embodiments.

[0057] The above is the preferred embodiment of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A single crystal furnace cover, characterized in that: The furnace cover comprises a furnace cover body, a heat insulation board spaced apart on the inner side wall of the furnace cover body, and a connecting piece for fixing the heat insulation board spaced apart on the inner side wall of the furnace cover body. Wherein, a heat-insulating hollow layer is formed between the inner side wall of the furnace cover body, the heat-insulating plate and the connecting piece.

2. The single crystal furnace cover according to claim 1, characterized in that: A side surface of the heat insulation board away from the inner side wall of the furnace cover body is provided with an absorption layer.

3. The single crystal furnace cover according to claim 2, characterized in that: The absorption layer is a black coating coated on a side of the heat insulation board away from the inner side wall of the furnace cover body.

4. The single crystal furnace cover according to claim 1, characterized in that: The shape of the heat insulation board is consistent with the shape of the inner side wall of the furnace cover body, and the distance between the heat insulation board and the inner side wall of the furnace cover body is greater than or equal to 10 mm.

5. The single crystal furnace cover according to claim 1, characterized in that: The connecting piece is vertically arranged between the inner side wall of the furnace cover body and the heat insulation board.

6. The single crystal furnace cover according to claim 5, characterized in that: The furnace cover body is formed with a through opening at the top and a cover opening at the bottom, and the top of the heat insulation board is formed with an opening matching the through opening. The connecting member includes a first connecting ring and a second connecting ring. The first connecting ring is arranged around the through opening at the top of the furnace cover body, and the second connecting ring is arranged around the cover opening at the bottom of the furnace cover body.

7. The single crystal furnace cover according to claim 6, characterized in that: The furnace cover body is formed with a plurality of functional through grooves, and the heat insulation plate is provided with functional through holes corresponding to the plurality of functional through grooves. The connecting member also includes a plurality of functional through slot connecting rings respectively arranged around the plurality of functional through slots on the top of the furnace cover body.

8. The single crystal furnace cover according to claim 7, characterized in that: The first connecting ring, the second connecting ring and the plurality of functional through-slot connecting rings are perpendicular to the tangent plane of the surface of the heat insulation board and the furnace cover body; the upper ends of the first connecting ring, the second connecting ring and the plurality of functional through-slot connecting rings are fixedly connected to the inner side wall of the furnace cover body; the lower ends of the first connecting ring, the second connecting ring and the plurality of functional through-slot connecting rings are fixedly connected to the heat insulation board.

9. The single crystal furnace cover according to claim 8, characterized in that: A plurality of through holes are formed on the surface of one or more of the first connecting ring, the second connecting ring and the plurality of functional through-groove connecting rings.

10. A single crystal furnace, characterized in that: It comprises a single crystal furnace cover as described in any one of claims 1-9.

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